Three-dimensional porous graphene microsphere for high-performance anode of lithium ion batteries

A stable graphene anode with high storage Li+ capacity for lithium-ion batteries (LIBs) is to be desired for energy storage. In the present paper, a new scalable method is adopted for preparation of three-dimensional porous graphene microspheres (3DGPM) by a template sacrificing method. The 3DGPM we...

Full description

Saved in:
Bibliographic Details
Published in:Surface & coatings technology 2019-02, Vol.360, p.232-237
Main Authors: Zhu, Bo, Liu, Xiaoxu, Li, Na, Yang, Chen, Ji, Tianyi, Yan, Kai, Chi, Hongyan, Zhang, Xiaolan, Sun, Fei, Sun, Daobin, Chi, Caixia, Wang, Xin, Wang, Ying, Chen, Liang, Yao, Lei
Format: Article
Language:English
Subjects:
Anode
Anodes
Charge transfer
Current density
Discharge
Electron microscopes
Electron transfer
Energy storage
Graphene
Graphene microsphere
Lithium
Lithium-ion batteries
Macrostructure
Microspheres
Nanospheres
Porous
Rechargeable batteries
Storage batteries
Three-dimensional
X-ray diffraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A stable graphene anode with high storage Li+ capacity for lithium-ion batteries (LIBs) is to be desired for energy storage. In the present paper, a new scalable method is adopted for preparation of three-dimensional porous graphene microspheres (3DGPM) by a template sacrificing method. The 3DGPM were utilized as an anode for lithium ion batteries (LIBs). The macrostructure of the 3DGPM anode was characterized by the scanning electron microscope, transmission electron microscope and X-ray diffraction. As anode for LIBs, the first discharge/charge capacities of the 3DGPM are 851.1 and 402.4 mAh g−1 at a current density of 0.1 A g−1. The 500th discharge capacity of the 3DGPM anode at a current density of 2 A g−1 is 245.8 mA h g−1. Besides, the 3DGPM exhibit low charge transfer resistance and high Li-ion diffusivities. The porous nanospheres of graphene offer voids for volume expansion and pathways for fast electron transfer during repeated cycling. We believe that the specific micro-/nano-hollow microspherical structure is the main origins of their high electrochemical storage Li performance. •3D porous graphene microspheres were fabricated by template sacrificing method.•The specific hollow graphene structure was detected.•The 3D porous graphene microspheres were utilized as an anode for lithium ion batteries•The electrochemical properties of graphene based anode are improved.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2018.12.104